Not every Keltner pierce is made the same. There are some minutiae you need to pay attention to. Here are some illustrations to help you out.
The big moves that followed weren't necessarily predicted by the Keltner channel but that doesn't mean we can't profit off of it. Whenever one is trend trading, it is better to let the profits run so one doesn't miss a big move like this. However, when the markets turn parabolic, use tighter stops as clearly history suggests what happens when things go wrong.
P.S. I know we don't trade SENSEX per se, this is a mere illustration. Any questions are welcome.